In the 1980s, coverage reached a high level and then stagnated, facing stubborn obstacles like those we see in the last stretch of polio and guinea worm eradication.

This was a whole new level: far from any settlements and often five days' walk from the nearest stretch of river navigable by boat.

In the afternoon with that community, he went to a stretch of level ground and there spoke to the crowds about the Good News of God and healed all the sick.